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#![feature(const_generics)]
pub mod crypto;
pub mod packet;
pub mod character;
pub mod util;
use std::io::Read;
#[derive(Debug, PartialEq)]
pub enum PacketParseError {
NotEnoughBytes,
WrongPacketCommand,
WrongPacketForServerType(u16),
WrongPacketSize(u16, usize),
DataStructNotLargeEnough(u64, usize),
InvalidValue,
ReadError,
}
trait PSOPacketData {
//fn size(&self) -> usize;
fn from_bytes<R: Read>(cursor: &mut R) -> Result<Self, PacketParseError> where Self: Sized;
fn as_bytes(&self) -> Vec<u8>;
}
impl PSOPacketData for u8 {
fn from_bytes<R: Read>(cursor: &mut R) -> Result<u8, PacketParseError> {
let mut bytes = [0u8; 1];
let len = cursor.read(&mut bytes).map_err(|_| PacketParseError::ReadError)?;
if len == 1 {
Ok(bytes[0])
} else{
Err(PacketParseError::NotEnoughBytes)
}
}
fn as_bytes(&self) -> Vec<u8> {
vec![*self]
}
}
impl PSOPacketData for u32 {
fn from_bytes<R: Read>(cursor: &mut R) -> Result<u32, PacketParseError> {
let mut bytes = [0u8; 4];
let len = cursor.read(&mut bytes).map_err(|_| PacketParseError::ReadError)?;
if len == 4 {
Ok(u32::from_le_bytes(bytes))
}
else {
Err(PacketParseError::NotEnoughBytes)
}
}
fn as_bytes(&self) -> Vec<u8> {
u32::to_le_bytes(*self).to_vec()
}
}
impl PSOPacketData for u16 {
fn from_bytes<R: Read>(cursor: &mut R) -> Result<u16, PacketParseError> {
let mut bytes = [0u8; 2];
let len = cursor.read(&mut bytes).map_err(|_| PacketParseError::ReadError)?;
if len == 2 {
Ok(u16::from_le_bytes(bytes))
}
else {
Err(PacketParseError::NotEnoughBytes)
}
}
fn as_bytes(&self) -> Vec<u8> {
u16::to_le_bytes(*self).to_vec()
}
}
impl PSOPacketData for String {
fn from_bytes<R: Read>(cursor: &mut R) -> Result<String, PacketParseError> {
let mut s: Vec<u8> = Vec::new();
cursor.read_to_end(&mut s).map_err(|_| PacketParseError::ReadError)?;
let mut utf16 = Vec::new();
for c in s.chunks(2) {
utf16.push(u16::from_le_bytes([c[0], c[1]]));
}
Ok(String::from_utf16_lossy(utf16.as_slice()))
}
fn as_bytes(&self) -> Vec<u8> {
let mut buf = Vec::new();
for c in self.as_str().encode_utf16() {
buf.extend_from_slice(&c.to_le_bytes());
}
buf
}
}
pub trait PSOPacket: std::fmt::Debug {
// const CMD: u16;
fn from_bytes(data: &[u8]) -> Result<Self, PacketParseError> where Self: Sized;
fn as_bytes(&self) -> Vec<u8>;
}
#[cfg(test)]
mod test {
use super::*;
use psopacket::{pso_packet, PSOPacketData};
#[test]
fn test_basic_pso_packet() {
#[pso_packet(0x23)]
struct Test {
a: u32,
b: u16,
c: u16,
}
let test = Test {
a: 123456789,
b: 54321,
c: 9999,
};
let mut bytes = test.as_bytes();
assert!(bytes == vec![16, 0, 35, 0, 0, 0, 0, 0, 21, 205, 91, 7, 49, 212, 15, 39]);
bytes[11] = 17;
let test2 = Test::from_bytes(&bytes).unwrap();
assert!(test2 == Test {
a: 291228949,
b: 54321,
c: 9999,
});
}
#[test]
fn test_array_in_packet() {
#[pso_packet(0x23)]
struct Test {
a: u32,
b: u16,
c: [u16; 3],
}
let test = Test {
a: 123456789,
b: 54321,
c: [1111, 2222, 3333],
};
let mut bytes = test.as_bytes();
assert!(bytes == [20, 0, 35, 0, 0, 0, 0, 0, 21, 205, 91, 7, 49, 212, 87, 4, 174, 8, 5, 13]);
bytes[17] = 17;
let test2 = Test::from_bytes(&bytes).unwrap();
assert!(test2 == Test {
a: 123456789,
b: 54321,
c: [1111, 4526, 3333],
});
}
#[test]
fn test_custom_type_in_packet() {
#[derive(Clone, Debug, PartialEq)]
pub struct MyType {
k: u8,
j: u32,
}
impl PSOPacketData for MyType {
fn from_bytes<R: std::io::Read>(cursor: &mut R) -> Result<MyType, PacketParseError> {
let mut kb = [0u8; 1];
cursor.read(&mut kb).map_err(|_| PacketParseError::ReadError)?;
let mut jb = [0u8; 4];
cursor.read(&mut jb).map_err(|_| PacketParseError::ReadError)?;
Ok(MyType {
k: kb[0],
j: u32::from_le_bytes(jb)
})
}
fn as_bytes(&self) -> Vec<u8> {
let jbytes = u32::to_le_bytes(self.j);
vec![self.k, jbytes[0], jbytes[1], jbytes[2], jbytes[3]]
}
}
#[pso_packet(0x23)]
struct Test {
a: u32,
b: u16,
c: MyType,
d: u8,
}
let test = Test {
a: 123456789,
b: 54321,
c: MyType {
k: 23,
j: 999999,
},
d: 5,
};
let mut bytes = test.as_bytes();
assert!(bytes == [20, 0, 35, 0, 0, 0, 0, 0, 21, 205, 91, 7, 49, 212, 23, 63, 66, 15, 0, 5]);
bytes[17] = 17;
let test2 = Test::from_bytes(&bytes).unwrap();
assert!(test2 == Test {
a: 123456789,
b: 54321,
c: MyType {
k: 23,
j: 1131071,
},
d: 5,
});
}
#[test]
fn test_string_in_packet() {
#[pso_packet(0x23)]
struct Test {
a: u32,
b: u16,
s: String,
}
let test = Test {
a: 123456789,
b: 54321,
s: "asdf あえいおう".to_string(),
};
let mut bytes = test.as_bytes();
assert!(bytes == vec![36, 0, 35, 0, 0, 0, 0, 0, 21, 205, 91, 7, 49, 212, 97, 0, 115, 0, 100, 0,
102, 0, 32, 0, 66, 48, 72, 48, 68, 48, 74, 48, 70, 48, 0, 0]);
bytes[18] = 99;
let test2 = Test::from_bytes(&bytes).unwrap();
assert!(test2 == Test {
a: 123456789,
b: 54321,
s: "ascf あえいおう\u{0}".to_string(),
});
}
#[test]
fn test_vec_in_packet() {
#[pso_packet(0x23)]
struct Test {
a: u32,
b: u16,
v: Vec<u16>,
}
let test = Test {
a: 123456789,
b: 54321,
v: vec![123,456,789],
};
let mut bytes = test.as_bytes();
assert!(bytes == vec![20, 0, 35, 0, 3, 0, 0, 0, 21, 205, 91, 7, 49, 212, 123, 0, 200, 1, 21, 3]);
bytes[18] = 99;
let test2 = Test::from_bytes(&bytes).unwrap();
assert!(test2 == Test {
a: 123456789,
b: 54321,
v: vec![123,456,867],
});
}
#[test]
fn test_no_flag_packet() {
#[pso_packet(0x23, no_flag)]
struct Test {
a: u32,
b: u16,
c: u16,
}
let test = Test {
a: 123456789,
b: 54321,
c: 9999,
};
let mut bytes = test.as_bytes();
assert!(bytes == vec![12, 0, 35, 0, 21, 205, 91, 7, 49, 212, 15, 39]);
bytes[11] = 17;
let test2 = Test::from_bytes(&bytes).unwrap();
assert!(test2 == Test {
a: 123456789,
b: 54321,
c: 4367,
});
}
#[test]
fn test_command_error() {
#[pso_packet(0x23)]
struct Test {
a: u32,
b: u16,
#[nodebug]
c: [u8; 0x2000],
}
let test = Test {
a: 123456789,
b: 54321,
c: [0; 0x2000],
};
let mut bytes = test.as_bytes();
bytes[2] = 17;
let test2 = Test::from_bytes(&bytes);
assert!(test2 == Err(PacketParseError::WrongPacketCommand));
}
#[test]
fn test_derive_pso_data_packet() {
#[derive(PSOPacketData, Debug, PartialEq)]
struct Test {
a: u8,
b: u32,
c: u16,
}
let test = Test {
a: 12,
b: 34567,
c: 890,
};
let mut bytes = test.as_bytes();
assert!(bytes == vec![12, 7, 135, 0, 0, 122, 3]);
bytes[2] = 17;
let mut cur = std::io::Cursor::new(bytes.clone());
let test2 = Test::from_bytes(&mut cur).unwrap();
assert!(test2 == Test {
a: 12,
b: 4359,
c: 890
});
}
#[test]
fn test_derive_pso_data_packet_array() {
#[derive(PSOPacketData, Debug, PartialEq)]
struct Test {
a: u8,
b: u32,
c: u16,
d: [u8; 5],
}
let test = Test {
a: 12,
b: 34567,
c: 890,
d: [1,2,3,4,5],
};
let mut bytes = test.as_bytes();
assert!(bytes == vec![12, 7, 135, 0, 0, 122, 3, 1, 2, 3, 4, 5]);
bytes[10] = 17;
let mut cur = std::io::Cursor::new(bytes.clone());
let test2 = Test::from_bytes(&mut cur).unwrap();
assert!(test2 == Test {
a: 12,
b: 34567,
c: 890,
d: [1,2,3,17,5]
});
}
#[test]
fn test_derive_pso_data_packet_not_enough_data() {
#[derive(PSOPacketData, Debug, PartialEq)]
struct Test {
a: u8,
b: u32,
c: u16,
}
let test = Test {
a: 12,
b: 34567,
c: 890,
};
let mut bytes = test.as_bytes();
bytes.extend(test.as_bytes());
let mut cur = std::io::Cursor::new(bytes.clone());
let test2 = Test::from_bytes(&mut cur).unwrap();
assert!(test2 == Test {
a: 12,
b: 34567,
c: 890,
});
let bytes2 = (0..14).collect::<Vec<_>>();
let mut cur = std::io::Cursor::new(bytes2);
let test3 = Test::from_bytes(&mut cur);
assert!(test3 == Ok(Test {
a: 0,
b: 67305985,
c: 1541,
}));
let test4 = Test::from_bytes(&mut cur);
assert!(test4 == Ok(Test {
a: 7,
b: 185207048,
c: 3340,
}));
let test5 = Test::from_bytes(&mut cur);
assert!(test5 == Err(PacketParseError::NotEnoughBytes));
}
}
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